If you're on Windows, use double-quotes on the command line. If you're on any Un*x variety, including cshell and bash on Solaris and Linux, use the single-quotes as given.

Every command shell differs in what needs escaping, and what is seen as one argument, or two arguments. However, many people playing golf seem to prefer the Un*x varieties. Maybe it's because Un*x has inspired golf since its inception: cp instead of copy; mv instead of move; ln instead of link; etc.

Know your command shell.

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